## Glossary: Module 7

All informal definitions are based on

my own experience and knowledge

### Term*: Mean*

* Informal Definition:*

The mean is the average of several numbers.

*Formal Definition:*

The mean is the average of the numbers: a calculated

“central” value of a set of numbers.

Definition from: mathisfun.com

*Example of Mean:*

Example from: quia.com

### Term*: Mode*

* Informal Definition:*

The mode is the number that occurs the most.

*Formal Definition:*

The mode is the number that is repeated more often than

any other.

Definition from: purplemath.com

*Example of Mode:*

Example from: room17math.wikispaces.com

### Term*: Median*

* Informal Definition:*

The median is the middle number in a set of numbers.

*Formal Definition:*

The median is the middle number (in a sorted list of numbers).

Half the numbers in the list are less, and half the numbers

are greater.

Definition from: mathisfun.com

*Example of Median:*

Example from: blogs.oregonstate.edu

### Term*: Range*

* Informal Definition:*

The range is the difference between the highest

score to the lowest score.

*Formal Definition:*

The range is the difference between the largest and

smallest values.

Definition from: purplemath.com

*Example of Range*

*Example from: easycalculation.com*### Term*: Frequency Distribution*

Informal Definition

A frequency distribution is a way to organize

and display to identify relationships among

that data.

Formal Definition

A table that lists a set of scores and their frequency

(how many times each one occurs).

Definition from: mathisfun.com

*Example of Frequency Distribution:*

* Example from: math.tutorvista.com*